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Nexperia USA Inc. BZX58550-C36-QX
- Part No.:
- BZX58550-C36-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BZX58550-C36-QX.pdf
- Description:
- DIODE ZENER 36V 300MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4,748
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Product details
Overview
BZX58550-C36-Q from Nexperia is a low-current Zener voltage regulator diode in SOD523 (SC-79) package, providing 36 V nominal regulation at 50 µA test current with ±5 % tolerance, 350 Ω typical differential resistance at 5 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX58550-C36-Q datasheet, BZX58550-C36-Q pinout, BZX58550-C36-Q application, or BZX58550-C36-Q equivalent, key selection criteria include low-bias operation capability, thermal resistance under PCB copper area constraints, reverse leakage at VR = 30 V, and compatibility with ultra-compact portable and automotive power rail stabilization circuits.
Technical Context
This device operates as a two-terminal shunt voltage reference, conducting in reverse breakdown to clamp voltage across load terminals. Its specified 50 µA test current enables stable regulation in micro-power systems where bias current must remain below 100 µA.
The ±5 % tolerance (C-series), 350 Ω dynamic impedance at 5 mA, and −0.05 mV/K temperature coefficient (typical at 36 V) define its precision envelope under ambient variations from −55 °C to +150 °C, with junction temperature limited to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 36 V at IZ = 50 µA - defines regulated output level for low-current bias networks |
| Voltage Tolerance | ±5 % - ensures VZ remains within 34.2 V to 37.8 V under production variation |
| Differential Resistance | 350 Ω max at IZ = 5 mA - limits output voltage shift under 1 mA load change to ≤350 mV |
| Forward Voltage | 0.9 V max at IF = 10 mA - enables predictable anode-cathode drop during forward conduction |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 with 35 mm² cathode Cu - sets maximum continuous DC power handling |
| Reverse Leakage Current | 0.05 µA max at VR = 30 V - critical for battery-powered standby circuits requiring sub-100 nA drain |
| Junction Temperature Limit | 150 °C - constrains thermal design margin when mounted on minimal PCB copper |
Pinout & Package
SOD523 (SC-79) plastic surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm body, flat lead, ultra-small footprint optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated voltage rail; marking bar identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in battery-backed real-time clocks and sensor biasing |
| AEC-Q101 qualification | Qualified for automotive applications - supports under-hood and infotainment power rail stabilization |
| Ultra-small SOD523 package | 1.2 mm × 0.8 mm footprint - fits high-density layouts in wearables and ADAS modules |
| Controlled leakage performance | ≤0.05 µA at 30 V reverse - preserves battery life in always-on monitoring circuits |
| Thermal robustness | Rth(j-a) = 350 K/W with 35 mm² cathode Cu - allows 300 mW dissipation without active cooling |
Applications
| Automotive Body Control Module | Portable Medical Sensor Bias |
|---|---|
Use Scenario: Stabilizing 3.3 V or 5 V supply rails for LIN transceivers and door-lock MCU peripherals. IC Role / Device Role / Timing Role: Shunt regulator maintaining reference voltage during load transients and battery voltage sag. Use Value: AEC-Q101 qualification and 150 °C junction rating ensure reliability across −40 °C to +105 °C under-hood environments. |
Use Scenario: Providing precise bias current to analog front-end amplifiers in handheld ECG patches. IC Role / Device Role / Timing Role: Low-leakage Zener reference enabling <100 nA quiescent current in sleep mode. Use Value: 0.05 µA IR at 30 V reverse and 50 µA test current support multi-year coin-cell operation. |
| Industrial IoT Node Power Rail | Smart Meter Reference Stabilization |
Use Scenario: Regulating auxiliary 3.3 V rail for LoRaWAN radio and microcontroller in remote sensor nodes. IC Role / Device Role / Timing Role: Voltage clamp protecting downstream LDO input during surge events. Use Value: 40 W non-repetitive peak power rating (100 µs pulse) absorbs transient energy without failure. |
Use Scenario: Stabilizing reference voltage for metrology ADC in Class 0.5 electricity meters. IC Role / Device Role / Timing Role: Precision shunt element compensating for supply ripple in isolated power domains. Use Value: ±5 % tolerance and 350 Ω rdiff limit reference drift to <±18 mV under 50 µA–5 mA load variation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX58550-B36-Q | ±2 % tolerance, higher initial cost, tighter VZ spread (35.3–36.7 V) | Preferred where metrology-grade stability required over temperature | Select when system-level calibration budget permits tighter voltage tolerance |
| MMSZ5245B-TP | 500 mW Ptot, SOD-123 package (2.7 mm × 1.4 mm), ±5 %, VZ = 36 V @ 10 mA | Higher power handling but 3.4× larger footprint; not AEC-Q101 qualified | Choose only if board space allows larger package and automotive qualification is unnecessary |
Compared with BZX58550-C36-Q, the BZX58550-B36-Q offers tighter regulation at higher cost and identical footprint, while MMSZ5245B-TP trades AEC-Q101 compliance and miniaturization for greater power margin in non-automotive industrial designs.
Availability
BZX58550-C36-Q is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensors, industrial IoT nodes, and smart meter reference stabilization requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX58550-C36-Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a leading Dutch semiconductor manufacturer specializing in high-volume, high-reliability discrete and logic devices, with global manufacturing and R&D centers.
The BZX58550-Q series belongs to Nexperia's automotive-qualified Zener diode portfolio, designed specifically for low-current voltage regulation in space-constrained, thermally demanding environments such as vehicle ECUs and portable electronics.
FAQ
What is the maximum reverse voltage that can be continuously applied to BZX58550-C36-Q without breakdown?
The device is rated for continuous reverse voltage up to its nominal Zener voltage of 36 V at 50 µA test current. Applying >36 V will initiate controlled breakdown; sustained operation above 36 V requires current limiting to stay within 300 mW power dissipation and 150 °C junction temperature limits.
How does the SOD523 package affect thermal performance compared to larger Zener packages?
With Rth(j-a) = 350 K/W on FR4 with 35 mm² cathode copper, the SOD523 delivers usable 300 mW dissipation despite its tiny size-achievable only through optimized thermal pad layout. Larger packages like SOD-123 offer lower Rth but occupy 3.4× more board area.
Is BZX58550-C36-Q suitable for use in a 24 V automotive system with load-dump transients?
No-it is not rated for load-dump protection. With a 36 V nominal Zener voltage and 40 W non-repetitive peak rating (100 µs), it clamps brief surges but cannot absorb full ISO 7637-2 Pulse 5a energy. Use dedicated TVS diodes like P6SMB36A for load-dump suppression.
Can BZX58550-C36-Q replace a 33 V Zener in an existing design?
Not directly-its 36 V nominal voltage differs by 3 V, altering regulation point and potentially causing overvoltage stress on downstream components. Substitution requires circuit revalidation including worst-case VZ tolerance (34.2–37.8 V), power dissipation, and thermal rise under actual operating conditions.
BZX58550-C36-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
BZX58550-C36-QX FAQ
1.How can I place an order for BZX58550-C36-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX58550-C36-QX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX58550-C36-QX reliable?
The price and inventory of BZX58550-C36-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX58550-C36-QX is usually 5 days.
3.What payment methods are accepted for BZX58550-C36-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX58550-C36-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX58550-C36-QX?
BZX58550-C36-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX58550-C36-QX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX58550-C36-QX?
For technical support, including BZX58550-C36-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX58550-C36-QX requirements.
6.How does Aetrix verify that BZX58550-C36-QX is sourced from the original manufacturer or authorized distributors?
All BZX58550-C36-QX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX58550-C36-QX meets industry standards.
7.What is the process for return or replacement of BZX58550-C36-QX?
All BZX58550-C36-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX58550-C36-QX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX58550-C36-QX part is unused and in its original packaging.
Return procedure for BZX58550-C36-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX58550-C36-QX Tags
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MM5Z5V1ST1G
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